Device for drying and/or calcining gypsum

Details Device for drying and/or calcining gypsum Device for drying and/or calcining gypsum

C - Chemistry, Metallurgy

04

B

C04B 11/028 (2006.01) B01F 3/06 (2006.01) B01F 15/06 (2006.01) F27B 17/00 (2006.01) F27D 3/08 (2006.01) F27D 99/00 (2010.01) B01F 7/00 (2006.01) F27D 3/15 (2006.01)

Patent

CA 2478062

The invention relates to a gypsum dryer/calciner (1) comprising a calcining space (2), a first pipe (4) exhibiting an inlet connected to a source of hot gases (3) and an outlet emerging in the calcining space (2); a second pipe (5) exhibiting an inlet connected to a source of gypsum (8) and an outlet emerging in the calcining space, the second pipe being concentric with the first pipe; a force-feeding screw (6) positioned at least partially in the second pipe, the said screw carrying the gypsum along in the calcining space. The invention also relates to a process for calcining gypsum and to the plaster capable of being obtained by this process.

L'invention concerne un sécher/cuiseur de gypse (1) comprenant un espace d e cuisson (2), un premier conduit (4) présentant une entrée raccordée à une source de gaz chauds (3), et une sortie débouchant dans l'espace de cuisson (2), u deuxième conduit (5) présentant une entrée raccordée à une source de gypse (8) et une sortie débouchant dans l'espace de cuisson, le deuxième conduit étant concentrique avec le premier conduit, une vis de gavage (6) disposée au moins partiellement dans le deuxième conduit, ladite vis entraînant le gypse dans l'espace de cuisson. L'invention concerne également un procédé de cuisson de gypse et le plâtre susceptible d'être obtenu par ce procédé.

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